Base member for duplicating device



March 15, 1966 DQPPELT 3,240,150

BASE MEMBER FOR DUPLICA'I'ING DEVICE Filed Dec. 20, 1965 HI IIIIHIIllllll IHIIIIIII INVENTOR. MAX J. DOF PELT UM C. @1124,

ATTORNEY United States Patent 3,240,150 BASE MEMBER FDR DUPLICATINGDEVICE Max J. Doppelt, 1920 W.. Sunnyside Ave., Chicago, Ill. Filed Dec.20, 1063, Ser. No. 332,116 3 Claims. (Cl. 101269) This invention relatesto improvements in duplicating devices, and more particularly to animprovement in a small inexpensive duplicating device that is providedwith a stencil and is capable of making a large number of copies withthe stencil.

In my US. Patent No. 2,203,192 there was disclosed a duplicating devicewhich was portable, inexpensive and could be used for making a largenumber of copies from a stencil.

The duplicating device after many years of use has been found inadequatein certain respects. One disadvantage thereof has to do with the basemember incorporated in this prior device. The prior base memberdisclosed in my earlier application had a plate incorporated thereinwhich was fixedly attached thereto and accordingly when the arcuateprinting surface of my devices printing member was forced against theplate and rockably actuated, the printing stock located therein had noactuating force from the plate member which would cause it in turn to beforced against the arcuate printing surface. Also, the size of theprinting stock to be used in my duplicating device was limited by themanner in which it was located on the printing plate of my device.

In order to obviate these difiiculties I have provided an improved meansof mounting a plate on the base member of my device which biases theplate upward thereby causing it to be forced against the arcuateprinting surface of my printing member when the same is operablyactuated with relation thereto and accordingly when a piece of printingstock is disposed on the plate, the same will be sandwiched between thearcuate surface of the printing member and the plate and these membersperform a squeezing or sandwiching effect on the printing stock. Also byproviding a key member in combination with spring biased spotting pegsthe location of different sized stock on the printing plate can beaccomplished without obstructing contact between a printing member andprinting plate.

It is therefore an object of this invention to provide a new andimproved duplicating device.

It is further an object of this invention to provide a new and improvedmeans for mounting a plate to the base member of a duplicating devicewhereby the plate is positioned to bias the printing stock upward oragainst the arcuate surface of a printing member.

It is still further an object of this invention to provide a new andimproved means for locating printing stock on a printing plate wherebyvaried sizes of printing stock can be utilized therein.

It is still further an object of this invention to provide a locatingmeans which doesnt obstruct contact of the printing members arcuatesurface with the plate.

It is still further an object of this invention to provide a means forlocating printing stock on a printing plate of a duplicating devicewherein the height of the locating means can be varied.

Other and further objects of this invention will become more readilyapparent from reading the specification with the drawing in which:

FIGURE 1 is a perspective view of my new and improved duplicatingdevice,

FIGURE 2 is a top view of the base member of the duplicating deviceillustrated in FIGURE 1,

FIGURE 3 is a cross-sectional view of FIGURE 2 ice taken along a planepassing thhrough the line 3-3 and looking in the direction of thearrows,

FIGURE 4 is a side elevation view of FIGURE 2 taken on a plane passingthrough the line 44 and looking in the direction of the arrows,

FIGURE 5 is a cross-sectional view illustrating the cooperation of myspotting pegs utilized for locating the printing stock taken on a planepassing through the line 5-5 and looking in the direction of the arrows,

FIGURE 6 is a cross-sectional view of a key member cooperating with oneof my spotting pegs to vary the size of printing stock to be located,taken on a plane passing through the lines 66 and looking in thedirection of the arrows, and

FIGURE 7 is a view of the key member mentioned in FIGURE 6.

Referring more specifically to the figures in the drawing, wherein likecharacters of reference indicate corresponding parts throughout theviews, I have provided a printing member 10 with substantially the sameconfiguration of the platen illustrated in my prior aforementionedpatent which consists of a hollow body or case with an arcuate printingsurface (no-t shown) at the bot tom thereof. The printing member hassegmental gears 13 at each end thereof disposed in opposing relationshipto each other. The base member 12 of my duplicating device includes areciprocally mounted plate 17 positioned on the top surface thereofinterposed between a pair of racks 1-5, as illustrated in FIGURE 2. Theracks 15 are positioned to intermesh with the segmental gears 13 toenable the printing platen to be rockably actuated thereby providing anoscillatory motion of the arcuate printing surface thereof.

As seen from FIGURES 2 and 3 a plurality of rivets 20 have one endthereof fixedly attached to the plate 17 and the other ends thereofprotruding through apertures 14A of the base support portion 14 tolocate the plate 17 with respect to the base member. The rivets aredisposed near the corners of the plate. The stems 20B of the rivets areslidably positioned in the apertures 14A and their motion upward withrespect to the base support portion 14 is limited by the heads 20A ofthe rivets.

As seen from FIGURES 2, 5 and 6 the locating means for the printingstock consists of spotting pegs 2'2 having pin shaped domes 22A withshouider portions 228 disposed in the recesses 14B of the base supportportion 14. Spring biasing members 22C are located in the recesses 14Bto force the spotting pegs upward and the shoulder portions against thebottom surface of the plate 17. The spotting pegs 22 are disposed at oneend of the plate to cause said end to be supported upward of the basesupport portion 14. The pin shaped domes 22A protrude through openings17A in the plate and one of these pin shaped domes is disposed on oneside of the plate while three of them are disposed at the other sidethereof as illustrated in FIGURE 2. The pin shaped domes are disposedwith respect to each other in a manner that different sizes of print-ingstock can be positioned therein by depressing one of the pin shapeddomes of the spotting pegs with a U-shaped key 28 which includes a shortarm 28A and a long arm 28B. As illustrated in FIGURE 6, the long arm ispositioned over the top of a dome to depress it while the short arm 28Ais disposed beneath the plate 17. The key is spring tempered to enableit to be clamped to the plate as illustrated in FIG- URE 6.

By providing the spring biased spotting pegs for locating the printingstock, the arcuate surface of the printing member depresses the pinshaped domes when contact is made therewith so that the spotting pegs donot impede contact with the printing stock The plate in being biasedupward by the pin shaped domes forces printing stock located thereoninto firm contact with the arcuate shaped printing surface of theprinting member thereby producing better copy. The U-shaped key Workingin combination with the depressible pin shaped. domes enables differentsize printing stock to be utilized as seen by the different sizes inFIGURE 2. Accordingly the objects of my invention are accomplishedefliciently and inexpensively.

It should be realized that although I show a specific arrangement of thespotting pegs working in combination with one key, I intend thisinvention to cover a device that has other arrangements for the spottingpegs with the possible utilization of more than one key. Also, thespecific construction that I have described in connection with aspecific type of duplicating device should not be taken to limit myinvention. I intend this invention to apply to a base that does notinclude racks.

Having now particularly described and ascertained the nature of my saidinvention and the manner in which it is to be performed, I declare thatwhat I claim is:

1. A duplicating device having an improved base comprising: a basesupport portion, a reciprocally mounted plate disposed over said basesupport portion, a plurality of rivets having one end fixedly attachedto said plate proximately disposed to each side of said plates, saidrivets having the other ends thereof protruding through said base withthe stems thereof slidably disposed with respect thereto, said rivetshaving heads at said other ends thereof limiting the sliding movement ofsaid stems with respect to said base, a plurality of spring biasedspotting pegs vertically slidably received in said base, said platehaving apertures at one end thereof disposed to receive said pegs, saidspotting pegs having shoulder portions biased against said plate tocause one end of said plate to be supported upward and apart from saidbase, said spotting pegs having pin shaped domes protruding through saidapertures in said plate, said domes of said spotting pegs being disposedand depressible to align and receive diiferent size printing stock forprinting.

2. In a duplicating device, as defined in claim 1, at least one keyremovably attached to said plate, said key being disposable to depressone of said domes of said spotting pegs, said key having a U shapeincluding a pair of arms with one arm of the U being shorter than theother arm, said long arm being disposable over the top of said domes todepress one of said domes while said short arm being disposed beneathsaid plate and being spring tempered to enable removable association ofsaid key with said plate, whereby different sized cards can be receivedand positioned by said plate by selectably depressing said domes withsaid long arm of said key, and said plate is forced upward to causecontact with a printing surface thereby moving printing stock locatedthereon into firm engagement with said printing surface.

3. An improved duplicating device that cooperates with a printing memberhaving an arcuate printing surface that has segmental gears at each sidethereof, comprising: a base, a base support portion, a reciprocallymounted plate disposed on said base support portion, a rack disposed ateach side of said base support portion, said racks having teeth thatintermesh with said segmental gears to provide a rotating motion of saidarcuate surface of said printing member on said plate, a plurality ofrivets having one end fixedly attached to said plate proximatelydisposed to each side of said plates, said rivets having the other endsthereof protruding through said base with the stems thereof slidablydisposed with respect thereto, said rivets having heads at said otherends thereof limiting the sliding movement of said stems with respect tosaid base, a plurality of spring biased spotting pegs verticallyslidably received in said base, said plate having openings at one endthereof disposed to receive said pegs, said spotting pegs havingshoulder portions biased against said plate to cause one end of saidplate to be supported upward of said base, said spotting pegs having pinshaped domes protruding through said apertures in said plate, said domesof said spotting pegs being disposed and depressible to align andreceive different sized printing stock for printing, a key remova'blyattached to said plate, said key being disposable to depress one of saiddomw of said spotting pegs, said key having a U shape including a pairof arms with one arm of the U being shorter than the other arm, saidlong arm being disposable over the top of said domes to depress one ofsaid domes while said short arm being disposed beneath said plate andbeing spring tempered to enable removable association of said key tosaid plate, whereby different sized cards can be received and positionedby said plate by selectably depressing said domes with said long arm ofsaid key, and said plate is forced into contact with said arcuatesurface of said printing member when said printing member depresses saidplate.

References Cited by the Examiner UNITED STATES PATENTS 992,461 5/ 1911Vandercook 101269 1,492,688 5/1924 Hidalgo 101-413 X 1,767,237 6/1930Clark 101125 X 2,144,849 1/1939 Moore 101-407 DAVID KLEIN, PrimaryExaminer.

ROBERT E. PULFREY, Examiner.

HARLEIGH P. EWELL, Assistant Examiner.

1. A DUPLICATING DEVICE HAVING AN IMPROVED BASE COMPRISING: A BASESUPPORT PORTION, A RECIPROCALLY MOUNTED PLATE DISPOSED OVER SAID BASESUPPORT PORTION, A PLURALITY OF RIVETS HAVING ONE END FIXEDLY ATTACHEDTO SAID PLATE PROXIMATELY DISPOSED TO EACH SIDE OF SAID PLATES, SAIDRIVETS HAVING THE OTHER ENDS THEREOF PROTRUDING THROUGH SAID BASE WITHTHE STEMS THEREOF SLIDABLY DISPOSED WITH RESPECT THERETO, SAID RIVETSHAVING HEADS AT SAID OTHER ENDS THEREOF LIMITING THE SLIDING MOVEMENT OFSAID STEMS WITH RESPECT TO SAID BASE, A PLURALITY OF SPRING BIASEDSPOTTING PEGS VERTICALLY SLIDABLY RECEIVED IN SAID BASE, SAID PLATEHAVING APERTURES AT ONE END THEREOF DISPOSED TO RECEIVE SAID PEGS, SAIDSPOTTING PEGS HAVING SHOULDER PORTIONS BIASED AGAINST SAID PLATE TOCAUSE ONE END OF SAID PLATE TO BE SUPPORTED UPWARD AND APART FROM SAIDBASE, SAID SPOTTING PEGS HAVING PIN SHAPED DOMES PROTRUDING THROUGH SAIDAPERTURES IN SAID PLATE, SAID DOMES OF SAID SPOTTING PEGS BEING DISPOSEDAND DEPRESSIBLE TO ALIGN AND RECEIVE DIFFERENT SIZE PRINTING STOCK FORPRINTING.